The petroleum refining Industry produces a variety of intermediate and finished products, including light hydrocarbons, diesei and jet fuels, light distillate fuel, gasoline, and heavy residual fuel oil. The refining process consists of a series of steps, such as separation of crude molecular constituents, cracking, and molecular rebuilding and solvent finishing. Refining operations include crude processing, transportation, treating and finishing, and coking processes. Plants range in size from 300 to 400,000 barrels/day. The majority of the refineries are located in Texas, Louisiana, and California.
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